In　order　to　improve　the　breaking　speed　of　miniature　circuit　breakers,　RecurDyn　Flux　and　Altair　Flux　were　used　to　build　an　electromagnetic　trip　simulation　model　coupled　with　multi-body　dynamics　and　electromagnetism　to　simulate　the　electromagnetic　trip　process　in　the　event　of　short-circuit　fault.　It　analyzes　the　dynamic　characteristic　curves　during　the　contact　separation　process　to　explore　the　factors　affecting　the　breaking　speed,　and　the　actual　electromagnetic　trip　process　was　photographed　by　high-speed　camera　to　verify　the　simulation　model.　Based　on　the　simulation　model,　the　orthogonal　experiment　is　designed　for　the　three　factors　that　affect　the　breaking　speed,　and　the　optimal　combination　of　factors　is　obtained.　The　test　results　show　that　the　design　scheme　can　increase　the　breaking　speed　of　mini　circuit　breaker　by　24.17%　compared　with　the　original　prototype.　©　Beijing　Paike　Culture　Commu.　Co.,　Ltd.　2025.